Protagonist: Lin Feng (other world name: Li Feiyu/Netherworld Demon Emperor). After thousands of years in the other world, he climbed to the top of the devil's path from a young age. He is cold and powerful, but deep down he retains a trace of obsession and tenderness for his original family. After returning, his power is suppressed by the rules of the world (it does not disappear completely, it needs to be gradually unblocked or used skillfully). He has rich combat experience, knowledge of alchemy and weapon refining (modern version) and the thinking mode of the Demon Emperor.
Style: The humor comes from the huge contrast between the powerful Demon Emperor and ordinary modern life (for example: the Demon Emperor calculates how to grab coupons, uses his spiritual sense to find parking spaces, and deals with weird parties), the protagonist's complaints, and the reactions of supporting characters. The passion is reflected in protecting the family, fighting against extraordinary enemies, fighting for hegemony among urban immortals, and the possible conflict between the two worlds in the later stage.
Power system: The levels of cultivating immortals in other worlds (Qi refining → Foundation building → Golden elixir → Nascent Soul → Transformation into gods → Overcoming tribulations → Transformation → Earth level) will be updated later. In modern cities, there is thin spiritual energy (or another form of energy), a small number of local practitioners/superpowers/ancient inheritance, and forces that may infiltrate from other worlds. The protagonist needs to adapt to and take advantage of the modern environment to "cultivate immortality" (such as using a pressure cooker to make elixirs, charging the thunder array and refining the body at the same time).
Main plot: Find your long-lost parents, sister (or other close relatives), and protect them, while gradually uncovering the truth about your own "travel" back then and the hidden extraordinary side of the modern world.
